Electronic recording device for continuous measurement of ?-radiations in radioactive gases

1964 ◽  
Vol 7 (5) ◽  
pp. 442-445
Author(s):  
A. F. Vinogradov ◽  
S. P. Rybak ◽  
M. D. Shibanova
Keyword(s):  
Continuous Measurement ◽  
Recording Device ◽  
Electronic Recording ◽  
Radioactive Gases

Compliance with anti-tuberculous therapy: a field trial of a pill-box with a concealed electronic recording device

1988 ◽  
Vol 35 (4) ◽  
pp. 401-407 ◽  
Author(s):  
R. Cheung ◽  
J. Dickins ◽  
P. W. Nicholson ◽  
A. S. C. Thomas ◽  
H. Hillas Smith ◽  
...  
Keyword(s):  
Field Trial ◽  
Recording Device ◽  
Electronic Recording

scholarly journals A Novel Underwater Location Beacon Signal Detection Method Based on Mixing and Normalizing Stochastic Resonance

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1292
Author(s):  
Guolong Liang ◽  
Guangming Wan ◽  
Jinjin Wang ◽  
Xue Wang
Keyword(s):  
Signal Detection ◽  
Stochastic Resonance ◽  
Water Immersion ◽  
Pulse Signal ◽  
Signal Frequency ◽  
Recording Device ◽  
Aviation Accidents ◽  
Novel Approach ◽  
Electronic Recording ◽  
Beacon Signal

A flight data recorder (FDR) is an electronic recording device placed in an aircraft for the purpose of facilitating the investigation of aviation accidents. If an aircraft crashes into water, an underwater locator beacon (ULB), which is installed on the FDR, is triggered by water immersion, and emits an ultrasonic 10 ms pulse signal once per second at 37.5 kHz. This pulse signal can be detected by sonar equipment. However, the ULB signal only can be detectable 1–2 kilometers from the surface in normal conditions. Stochastic resonance (SR) is a rising theory in the field of weak signal detection. The classical stochastic resonance limits state that the input must be small-parameter and the sampling frequency must be 50 times higher than the signal frequency. It cannot be applied to the ULB signal detection. To resolve this problem, this paper presents a novel approach named mixing and normalizing stochastic resonance (MNSR). By mixing the ULB signal and normalizing SR system parameters, MNSR provides a new way to detect weak ULB signal. Meanwhile, we propose the parameters adjustment method of MNSR. We prove the effectiveness through numerical simulation. An experiment in a tank is employed to verify the practicability of this method.

Field Methods and Techniques: Observation—IV

1951 ◽  
Vol 10 (2) ◽  
pp. 33-34
Keyword(s):  
Background Noise ◽  
Objective Test ◽  
Recording Device ◽  
Normal Range ◽  
Field Methods ◽  
Methods And Techniques ◽  
Electronic Recording ◽  
Human Ear ◽  
The Voice

In recording the sound of the voice, of course, the problem of establishing criteria for determining the beginning or ending of an individual's activity is quite simple. As previously stated, we are limited by the threshold of the apparatus used to record sound, whether it is the human ear or an electronic recording device. Assuming, by objective test, that the individual's hearing is within the normal range and that he is demonstrably placed at a distance from the persons being observed, so that we can reasonably expect to hear at least when they are saying even if not always what, our criterion becomes one of the presence or absence of sound. To be used accurately, the criterion should state the conditions of observation, i.e., such factors as distance from the person, being outdoors or indoors, presence of background noise and the like, which may be limiting features. In the same way, when a tape or wire recorder is being used, the characteristics of the instrument should be given, as well as the location of the microphone and its capacity for picking up the voice at varying distances and intensities.

Evaluation of single-electron movies of glutamine synthetase molecules

1983 ◽  
Vol 41 ◽  
pp. 280-281
Author(s):  
W. Kunath ◽  
E. Zeitler ◽  
M. Kessel
Keyword(s):  
Electron Microscope ◽  
Glutamine Synthetase ◽  
Electron Irradiation ◽  
Structural Damage ◽  
Structural Changes ◽  
Single Electron ◽  
Continuous Series ◽  
Digital Recording ◽  
Recording Device ◽  
Low Exposure

The features of digital recording of a continuous series (movie) of singleelectron TV frames are reported. The technique is used to investigate structural changes in negatively stained glutamine synthetase molecules (GS) during electron irradiation and, as an ultimate goal, to look for the molecules' “undamaged” structure, say, after a 1 e/Å2 dose.The TV frame of fig. la shows an image of 5 glutamine synthetase molecules exposed to 1/150 e/Å2. Every single electron is recorded as a unit signal in a 256 ×256 field. The extremely low exposure of a single TV frame as dictated by the single-electron recording device including the electron microscope requires accumulation of 150 TV frames into one frame (fig. lb) thus achieving a reasonable compromise between the conflicting aspects of exposure time per frame of 3 sec. vs. object drift of less than 1 Å, and exposure per frame of 1 e/Å2 vs. rate of structural damage.

Direct Measurement of the Listening of Hearing-Impaired Children

1970 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Mary Mira
Keyword(s):  
Direct Measurement ◽  
Continuous Measurement ◽  
Hearing Impaired ◽  
Reinforcement System ◽  
School Aged Children ◽  
Conjugate Reinforcement ◽  
Impaired Children ◽  
Hearing Impaired Children

Listening, a significant dimension of the behavior of hearing-impaired children, may be measured directly by recording childrens' responses to obtain audio narrations programmed via a conjugate reinforcement system. Twelve hearing-impaired, school-aged children responded in varying ways to the opportunity to listen. Direct and continuous measurement of listening has relevance for evaluation of remediation methods and for discovery of variables potentially related to listening.

A Rapid Radioisotope Dilution Technique for the Accurate Determination of the Cardiac Output

1968 ◽  
Vol 07 (01) ◽  
pp. 1-7
Author(s):  
Muhammad Razzak ◽  
Robert Botti ◽  
William MacIntyre
Keyword(s):  
Cardiac Output ◽  
Isotope Dilution ◽  
Accurate Determination ◽  
Differential Count ◽  
Stroke Index ◽  
Recording Device ◽  
Dilution Curve ◽  
Index Stroke Volume ◽  
Index Stroke ◽  
Comparison Of The Results

SummaryA pair of printing scalers was used to record the information obtained by external monitoring of the isotope dilution curve following the intravenous injection of radioiodinated human serum albumin. The first scaler gives the differential count rate of the curve at increments of one second, whereas the second integrates continuously the isotope dilution curve. This recording device enabled cardiac output determinations to be calculated rapidly at the bedside without any loss in accuracy.Using this method in 15 normal individuals, the cardiac output was found to be 6.13 ± 0.73 liters/minute (Mean ± 1 S.D.), with a cardiac index of 3.36 ± 0.35 liters/minute/m2. In the same group of normals, the stroke index (stroke volume/surface area) amounted to 50 ± 7.3 ml/beat/m2.Comparison of the results of this method with those obtained by integration of the entire isotope dilution curve by an IBM 1620 computer showed excellent agreement, proving the validity of the suggested technique.

Continuous measurement of free cortisol profiles

2013 ◽  
pp. 1-1
Author(s):  
Ragini C Bhake ◽  
Jack A Leendertz ◽  
Astrid C E Linthorst ◽  
Stafford L Lightman
Keyword(s):  
Continuous Measurement ◽  
Free Cortisol

On-line measurements of settling characteristics in activated sludge

1997 ◽  
Vol 36 (4) ◽  
pp. 307-312
Author(s):  
Michael R. Rasmussen ◽  
Torben Larsen
Keyword(s):  
Activated Sludge ◽  
Settling Velocity ◽  
Continuous Measurement ◽  
Batch Reactor ◽  
Volume Index ◽  
Sludge Volume Index ◽  
Dynamic Variations ◽  
On Line ◽  
Settling Column ◽  
Settling Characteristics

An on-line settling column for measuring the dynamic variations of settling velocity of activated sludge has been developed. The settling column is automatic and self-cleansing insuring continuous and reliable measurements. The settling column was tested on sludge from a batch reactor where sucrose was added as an impulse to activated sludge. The continuous measurement of settling velocity revealed a highly dynamic response after the sucrose was added. The results were verified with simultaneous measurement of the initial settling rate. A 200 hour experiment showed variations in settling velocity, which was not apparent in the DSVI (Diluted Sludge Volume Index).

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